mongo - start mongo shell

// mongod is the primary daemon process for the MongoDB system. It handles data requests, 
// manages data format, and performs background management operations.
mongod --config /etc/mongodb.conf

// mongos

// mongoimport
mongoimport - import content from a JSON, CSV, or TSV
mongoimport --db users --collection contacts --file contacts.json

// mongoexport is a utility that produces a JSON or CSV export of data stored in a MongoDB instance
mongoexport --db users --collection contacts --csv --fieldFile fields.txt --out /opt/backups/contacts.csv
mongoexport --db sales --collection contacts --out contacts.json --journal

// Do not use mongoimport and mongoexport for full-scale production backups 
// because they may not reliably capture data type information.

// mongodump is a utility for creating a binary export of the contents of a database.
mongodump --collection collection --db test
mongodump --dbpath /srv/mongodb
mongodump --host mongodb1.example.net --port 37017 --username user --password pass --out /opt/backup/mongodump-2011-10-24

mongorestore --collection people --db accounts dump/accounts/people.bson

mongostat

mongotop